Check the water flow-rate of the evaporator
Check that the difference between the temperature of the
exchanger's input and output water corresponds to the potential
according to this formula:
unit cooling power (kw) x 860 = Dt (°C) x flow rate (L/h)
The cooling power is shown in the GENERAL TECHNICAL DATA
chart included in this manual, referred to specific conditions, or
in the
COOLING PERFORMANCE charts in the TECHNICAL BULLETIN
referred to various conditions of use.
Check for water side exchanger pressure drops:
Determine the water flow-rate
measure the difference in pressure between the exchanger’s input
and output water and compare it with the WATER-SIDE
EXCHANGER PRESSURE DROPS chart
Measuring the pressure is easier if pressure gauges are installed
as indicated in the DIAGRAM OF SUGGESTED WATER
CONNECTIONS.
Scroll compressor (only 30.2-40.2)
Scroll compressors have only one rotation direction.
In the event it is reversed, the compressor is not immediately
damaged but it becomes more noisy and pumping is jeopardized.
After a few minutes, the compressor shuts down due to the
thermal protection trip.
In this case, disconnect the power supply and invert 2 phases on
the machine power supply.
Do not let the compressor work for a long time with opposite
rotation: more than 2-3 of these abnormal start-ups can damage
it.
To ensure the rotation direction is correct, measure the
condensation and suction pressure.
The pressures must differ significantly: upon start-up, the suction
pressure decreases while the condensation one increases.
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